Leon Rook, age 75, of Lee's Summit, Missouri, passed away May 22, 2011. A celebration of life was held at 10 a.m. June 1 at Langsford Funeral Home, Lee's Summit, Missouri, with burial following in Lee's Summit Historical Cemetery. Visitation was 6 to 8 p.m. May 31 at the funeral home.Leon was born August 17, 1935 in Greenfield, Missouri. He graduated from Jasper, Missouri, High School in 1953 and served two years in the U.S. Navy. He earned his B.S. degree from S.M.S., Masters from M.U., and Specialist from C.M.S.U. He was a business teacher for three years in Butler,…